0.2.0 Editor Update has been released!

[Happypig375]

0.2.0 Editor Update - the final minor update of CSharpMath before becoming MathDisplay.NET (Edit by the time of 0.3.0 release: Not yet... I'll do it when I have time.).

Features

• A math editor! There are two ways to use it, below are CSharpMath.Forms examples:

1. Having a custom keyboard:

//from XAML
SkiaSharp.Views.Forms.SKCanvasView canvasView = ...;
Xamarin.Forms.Button button = ...;

var painter = new CSharpMath.SkiaSharp.MathPainter
{ /*set all properties aside from LocalTypefaces, FontSize, LineStyle,
    MathList, LaTeX and Source (these are ignored)*/ };
var keyboard = new CSharpMath.Rendering.MathKeyboard(/*optional fontSize*/)
{ /*set Fonts, LineStyle and InsertionIndex here*/ };
button.Pressed += (sender, e) => keyboard.KeyPress(CSharpMath.Editor.MathKeyboardInput.SmallX /*or any key*/);
keyboard.RedrawRequested += (sender, e) => canvasView.InvalidateSurface();
canvasView.PaintSurface += (sender, e) => {
  e.Surface.Canvas.Clear();
  //for any DrawDisplay overload, arguments after canvas are the same as Draw
  CSharpMath.SkiaSharp.MathPainter.DrawDisplay(painter, keyboard.Display, e.Surface.Canvas);
  keyboard.DrawCaret(
    new CSharpMath.SkiaSharp.SkiaCanvas(e.Surface.Canvas, SkiaSharp.SKStrokeCap.Butt, false),
    CSharpMath.Rendering.CaretShape.IBeam);
};

2. Using the default keyboard:

//from XAML
SkiaSharp.Views.Forms.SKCanvasView canvasView = ...;
CSharpMath.Forms.MathKeyboard keyboard = ...;

var painter = new CSharpMath.SkiaSharp.MathPainter
{ /*set all properties aside from LocalTypefaces, FontSize, LineStyle,
    MathList, LaTeX and Source (these are ignored)*/ };
keyboard.RedrawRequested += (sender, e) => canvasView.InvalidateSurface();
canvasView.PaintSurface += (sender, e) => {
  e.Surface.Canvas.Clear();
  //for any DrawDisplay overload, arguments after canvas are the same as Draw
  CSharpMath.SkiaSharp.MathPainter.DrawDisplay(painter, keyboard.Display, e.Surface.Canvas);
  keyboard.DrawCaret(e.Surface.Canvas, CSharpMath.Rendering.CaretShape.IBeam);
};

• An analog clock in CSharpMath.Forms.Example - credits to https://github.com/sadqiang at How to specify a certain point of the equation bounding box as a reference point? #27
  

Why did it take so long?

October was the month when most of the logic were ported successfully. However, with limited understanding of .xib files which are Xcode UI definitions, I tried to literally port the XML contents to C#, but resulted in messy code. There went November.
A port of the keyboard UI code to XAML costed a December's worth of time.
Not much happened here in January, mostly waiting for potential bug reports.
Welp, that was time badly spent. I'm sorry for that.

Current plans

• .Net LaTeX projects #4 Merge with wpf-math
  • F# instead of C# (just as interoperable but much more maintainable)
  • Refactor TextAtoms and MathAtoms to have common atoms
  • Refactor MathAtoms to get rid of MathAtomType and AtomCloner
  • Unit tests (and picture comparisons)
  • Tavis CI integration
  • An intuitive README for getting started
  • Documentation on both NuGet and GitHub wiki
  • Document release procedure
  • Promote awareness!!
  • Native platform support for the popular ones
• Implement \middle
• Optimize loading times of the Android example project

A new start

The merge with wpf-math is happening in this repository. Please watch the repository for future updates!

Supersedes #21.

[sadqiang]

In the animation given above, instead of showing xxxxxx... (typing x multiple times), why don't we show something like \int_a^b f(x)\, \mathrm{d}x=F(b)-F(a), for example such that we can see the practical purposes?

[Happypig375]

To show the actual code for implementing one button, small x in this case.

[charlesroddie]

Great work @Happypig375. For keyboard input into a Xamarin.Forms control I think the best thing is an Effect (or otherwise custom renderer) on UWP that handles focus and keyboard input. Looking into this.

[Happypig375]

Superceded by #104